Base Station Database Inquiry for Protected Service Interference Avoidance
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Solution Overview
Problem
Co-channel wireless communications systems face interference issues due to the 'blind base station' problem, where the base station may not detect harmful interference with protected services, especially when network members within the overlapping area are absent or non-functional, leading to potential interference with protected services.
Innovation Solution
A base station is configured to access a database for information on protected wireless unidirectional broadcast services before selecting a frequency, evaluating this information to avoid interfering with protected services, thereby establishing a non-protected wireless bi-directional telecommunication service on a frequency that does not conflict with protected services.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the base station relies on network members to detect interference, then the detection capability is limited, but the base station may become blind to harmful interference when no network members are present in the overlapping area
Solution Approach 1:
The patent introduces a database as an intermediary between the base station and protected services. The database stores information about protected services and their coverage areas, allowing the base station to query and evaluate potential interference without relying on network members for detection. This mediator provides comprehensive interference detection capabilities that are not limited by the presence or functionality of network members.
Solution Approach 2:
The patent implements preliminary action by having the base station query the database for protected service information before establishing communications. This advance evaluation allows the base station to select frequencies that will not cause harmful interference to protected services, preventing the blind base station problem from occurring in the first place rather than detecting it after the fact.
2Object-affected harmful factors
If the base station uses database inquiry to evaluate protected services, then interference with protected services is prevented, but the frequency selection process becomes more complex
Solution Approach 1:
The base station performs preliminary evaluation by querying the database for protected service information before selecting a frequency. This advance check includes comparing the intended frequency against protected services in the database and evaluating potential interference based on stored coverage area and operational parameters, ensuring no harmful interference occurs before communications are established.
Solution Approach 2:
The database provides feedback information about protected services to the base station, including coverage areas, frequencies in use, and operational parameters. The base station uses this feedback to evaluate potential interference and adjust its frequency selection accordingly, creating a closed-loop system that prevents harmful interference through informed decision-making.
Data Source
AI summary
A database stores updated information concerning protected communications services. A base station for a coexisting, and potentially co-channel, non-protected communications service makes an inquiry of the database requesting an identification of geographically relevant protected services along with the database stored information pertinent to each of those identified protected services. The returned information is processed by the base station to determine what channels are available for use by the non-protected service. An available channel is identified by the base station as the working channel for the non-protected service and the base station initiates a process to establish a communications network using the non-protected service and the selected working channel.